On a similar note, apostasy aside, even criticizing Islam can be dangerous.
A very well known example of that is Khomeini, a prominent Muslim religious leader ordering the killing of an author Salman Rashdi for criticizing Islam in his famous book The Satanic Verses (a novel partly based on Mohammed’s life).
Why a Muslim religious leader demands someone's death over criticizing Islam?
BTW this order has been renewed with a staggering bounty on Rashdi's head:
Ayatollah Khomeini, the First Supreme Leader of Iran, issued the fatwa against Rushdie on charges of blasphemy for his novel The Satanic Verses on 15 February, 1989.
The Ayatollah called for the death of the book's author along with anyone "involved in its publication".
Hitoshi Igarashi, the Japanese translator of The Satanic Verses, was stabbed to death outside his office at Tsukuba University, the Italian translator Ettore Capriolo survived being stabbed at his apartment in Milan, and the novel's Norwegian publisher was shot three times in the back and left for dead outside his home in Oslo